JPS5951854U - Hydraulic circuit of 2-pump hydraulic excavator - Google Patents
Hydraulic circuit of 2-pump hydraulic excavatorInfo
- Publication number
- JPS5951854U JPS5951854U JP14687182U JP14687182U JPS5951854U JP S5951854 U JPS5951854 U JP S5951854U JP 14687182 U JP14687182 U JP 14687182U JP 14687182 U JP14687182 U JP 14687182U JP S5951854 U JPS5951854 U JP S5951854U
- Authority
- JP
- Japan
- Prior art keywords
- switching valve
- pump
- circuit
- located upstream
- hydraulic
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Landscapes
- Operation Control Of Excavators (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
第１図は従来の２ポンプ式油圧ショベルの油圧回路図、
第２図は本考案の２ポンプ式油圧ショベルの油圧回路図
である。
ａ、ｂ・・・制御弁、１．２−・・ポンプ、３． ４．
５゜６、 ７． ８． ９． １０・・・切換弁、１
１・・・アームシリンダ、１２・・・旋回モータ、１３
．１４・・・走行モータ、１５・・・パケットシリンダ
、１６・・・ブームシリンダ、１７．１８・・・絞り。Figure 1 is a hydraulic circuit diagram of a conventional two-pump hydraulic excavator.
FIG. 2 is a hydraulic circuit diagram of the two-pump type hydraulic excavator of the present invention. a, b...Control valve, 1.2-...Pump, 3. 4.
5゜6, 7. 8. 9. 10...Switching valve, 1
1...Arm cylinder, 12...Swivel motor, 13
．． 14...Travel motor, 15...Packet cylinder, 16...Boom cylinder, 17.18...Aperture.
Claims (1)
に位置する切換弁３によりアクチュエータ１１と１２に
給排制御され、他方のポンプ２からの圧油が制御弁すの
切換弁１０と上流に位置する切換弁（例えば切換弁８）
によりアクチュエータ１１と例えばアクチュエータ１５
に給排制御され、前記切換弁４と１０が同一の操作レバ
により同時に連動操作され同一のアクチュエータ１１へ
各別のポンプ１および２からの圧油を給排制御するもの
において、前記制御弁ａの切換弁３と切換弁４がタンデ
ム回路で連結され、前記切換弁すの切換弁１０は上流に
位置する切換弁とタンデム回路で連結されると共に切換
弁１０内に設けられた絞り１７．１８を介してパラレル
回路で連結したことを特徴とする２ポンプ式油圧ショベ
ルの油圧回路。Pressure oil from one pump 1 is supplied to and discharged from actuators 11 and 12 by switching valve 4 of control valve a and switching valve 3 located upstream, and pressure oil from the other pump 2 is controlled to be supplied to and discharged from the switching valve of control valve A. 10 and a switching valve located upstream (for example, switching valve 8)
actuator 11 and actuator 15, for example.
, and the switching valves 4 and 10 are simultaneously operated in conjunction with the same operation lever to control the supply and discharge of pressure oil from the respective pumps 1 and 2 to the same actuator 11, in which the control valve a The switching valve 3 and the switching valve 4 are connected by a tandem circuit, and the switching valve 10 of the switching valve 10 is connected to a switching valve located upstream by a tandem circuit, and a throttle 17 and 18 provided in the switching valve 10 is connected to the switching valve 10 located upstream. A hydraulic circuit for a two-pump hydraulic excavator, characterized in that the two-pump hydraulic excavator is connected via a parallel circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14687182U JPS5951854U (en) | 1982-09-28 | 1982-09-28 | Hydraulic circuit of 2-pump hydraulic excavator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14687182U JPS5951854U (en) | 1982-09-28 | 1982-09-28 | Hydraulic circuit of 2-pump hydraulic excavator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5951854U true JPS5951854U (en) | 1984-04-05 |
| JPH0245317Y2 JPH0245317Y2 (en) | 1990-11-30 |
Family
ID=30326779
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14687182U Granted JPS5951854U (en) | 1982-09-28 | 1982-09-28 | Hydraulic circuit of 2-pump hydraulic excavator |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5951854U (en) |
-
1982
- 1982-09-28 JP JP14687182U patent/JPS5951854U/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0245317Y2 (en) | 1990-11-30 |
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